Location History:
- Odawara, JA (1976 - 1977)
- Odawara, JP (1978 - 1979)
- Nihonbashi-Muro, JP (1980)
Company Filing History:
5 out of 1,252 
1 out of 1 Years Active: 1976-1980
Title: The Innovative Contributions of Hidehiko Ishikawa
Introduction
Hidehiko Ishikawa is a notable inventor based in Odawara, Japan. He has made significant contributions to the field of color printing, holding a total of six patents. His work has advanced the technology used in photographic treatments and color reproduction.
Latest Patents
One of Ishikawa's latest patents is a color printing method that involves exposing a color photosensitive material to object illuminating light during the photographing step. This light is recorded as an optical density through photographic treatments. In the printing step, the optical density is detected to determine the blue, green, and red exposures necessary to reproduce the object illuminating light on a color positive photosensitive material. This process ensures that the final output achieves neutral gray or is colored to a standard color. The object image on the color photosensitive material is printed with the most suitable color reproduction, utilizing the same three-color component exposures determined during the printing of the object illuminating light.
Career Highlights
Throughout his career, Ishikawa has worked with prominent companies in the photography industry, including Konishiroku Photo Industry Co., Ltd. and Konishiroku Photo Co. Ltd. His experience in these organizations has contributed to his expertise in color printing technologies.
Collaborations
Ishikawa has collaborated with notable colleagues such as Masanobu Oguchi and Yasuo Uchida. Their combined efforts have furthered advancements in the field of photography and color reproduction.
Conclusion
Hidehiko Ishikawa's innovative work in color printing has made a lasting impact on the industry. His patents and collaborations reflect his dedication to enhancing photographic technology.